I had the same truck before. I did the math. Even though gas is cheaper by the gallon, it is more expensive per mile to run a gasser(assuming you get better mileage in your CTD). Diesel all the way!!! That's why I have a CTD :thumbsupi had a 5.3L (gas) silverado and the couple times I towed it was like 11mpg and 15 empty. I've now got a 5.9L Cummins and I get 16 empty and like 15 the couples times i've been towing. Both were around the same weight. Go diesel if you're going to tow consitently but if you're going to do more empty than towing, weigh your consequences more carefully.